ASME A112.18.8-2020 pdf download

ASME A112.18.8-2020 pdf download.Sanitary Waste Valves for Plumbing Drainage Systems.
3.2 One-Way SeaLing Performance of the Valve
3.2.1 Test Apparatus. The test apparatus is as follows:
(a) length 0 ?/4 in. (6 mm) bore rubber tubing
(b) tee-junction suitable for use with the rubber tubing
(c) u-tube manometer with a range of 0 in. (0 mm) to 6 in. (152 mm) of water, gage
(d) reducer to enable the rubber tube to be connected to the outlet of the valve
3.2.2 Test Method. Prime the valve by running a gallon of water through the valve to waste. Connect the rubber tubing through the reducer to the outlet of the valve. Connect the other end of the tube to the tee-junction, one leg of which Is connected to the u-tube manometerand the remaining leg to another length of tubing. Apply air pressure to the free end of the tubing until a pressure of 4 in. (102 mm) of water, gage, is registered on the u-tube manometer. Clamp the end of the tube and maintain pressure for 20 sec. Release the pressure and leave the valve and eqUipment in situ for a minimum of48 hr. then retest under the same conditions but omit the water priming stage.
3.2.3 Performance Requirements. The valve shall retain a seal under a back pressure, equivalent to 4 in. (102 mm) of water, gage, for 20 sec on both the initial test (with valve primed) and the retest.
3.3 AIrway Flow Rate
3.3.1 Test Method. The airway flow rate test shall be performed in accordance with ANSI/ASSE 105 1-2009. paras.
3.2.2 through 3.2.3.
3.3.2 Performance Requirements. The maximum opening pressure of the device shall meet the requirements of ANSI! ASSE 1051-2009. para. 3.2.4. The measured airflow rate shall be at least 1 ft3/min (0.47 L/s) in accordance with the requirements for 1’/4-in. and 1’/2-in. drainage systems in ANSI/ASSE 1051-2009, para. 1.2.3 and Table 1.
3.4 Recovery From an Excess Back Pressure (Inversion) Condition
3.4.1 Test Method. Fit the valve to be tested to a standard sink and connect the arrangement of pipe work shown in Figure 3.4.1-1 to the outlet of the valve. Close valve at point B. Slowly open valve C until the bladder inverts and water flows into the sink. Record the pressure at the point of inversion. Close valve C; open valve B. Insert the sink plugand fill the sink with water to level A.
NOTE: Failure of the bladder to invert shall not constitute a failure of the test or a reason to stop the test.
3.4.2 Performance Requirements. When the sink plug is removed, the sink shall completely drain. At the completion of the test in para. 3.4.1, the valve shall be tested in accordance with paras. 3.1 and 3.2. Failure to achieve the performance parameters prescribed in paras. 3.1 and 3.2 shall be cause for rejection of the valve.
3.5 Leak Tightness
3.5.1 Test Method. The valve shall be tested In accordance with the hydrostatic pressure test In ASTM F409 using an internal pressure of 25 psi (172 kPa) for 1 hr.
3.5.2 Performance Requirements. The valve shall show no evidence of leakage and demonstrate air tightness.
3.6 ThermaL CycLing
3.6.1 Test Requirement. The valve shall complete the following thermal cycling test procedure for 5 cycles and allow 5 sec of draining time between cycles:
7.9 gpm (30 L/rnin) of waterat a temperature of 203°F ± 4°F (95°C ± 2°C) over a period of 15 mm at a constant [low rate
(b) 7.9 gpm (30 L/min) of water at a temperature of 68°F ± 10°F (20°C ± 5°C) over a period of 10 mm at a constant flow rate
3.8.4 Performance Requirements. At the completion of the above test, the valve shall be tested in accordance with para. 3.2 and meet the requirements of para. 3.2.3.
3.9 Resistance to ChemicaLs and SoLvents
3.9.1 Test Requirement. The valve shall be attached to a sink fitted with a standard crosspiece outlet.
3.9.2 Substances to Be Tested. Each test shall be carried out separately using a quantity of3?4 Pt [12 fi oz (0.35 L)] of one of the following solvents:
(a) solvent 1: liquid drain cleaner containing sulfuric acid
(li) solvent 2: mineral spirits
(c) solvent 3: kerosene
3.9.3 Test Method. Pour the solvent Into the sink outlet. After 1 mm, pour 4 Pt 164 fl oz (1.9 L)j of cold water Into the sink outlet to flush the solvent from the sink Leave the system for 24 hr.
3.9.4 Performance Requirements. At the completion of the above test, the valve shall be tested in accordance with para. 3.2 and meet the requirements of para. 3.2.3.
3.10 Drop
3.10.1 Test Method. The test shall be conducted over a clean concrete surface. Hold the valve with the lowest point upside down 3 ft (0.91 m) above the surface and release the valve. Pick up the valve and change orientation (top upper. most) and releaseonto concrete again. Pick up the valve one final time and change orientation (sideways) and release onto concrete. Observe the valve for any changes.
3.10.2 Performance Requirements. The valve shall show no signs of deformation or breakage that may affect its function.
3.11 Life cycLe
3.11.1 Test Requirement. The valve’s resistance to cyclic fatigue under ambient conditions shall be tested using the apparatus shown in Figure 3.11.1-1.
3.11.2 Test Method. The valve shall undergo 20,000 cycles. A cycle comprises 10 sec of exposure to water followed by
10 sec of draining.
3.11.3 Performance Requirements. At the completion of the above test, the valve shall be tested in accordance with para. 3.2.